Bicycle gears
Chainrings × wheel × cadence → speed and meters of development (gear inches)
Drivetrain
Speed
Development per rev: 2,3 м · Ratio: 1.00
11,1 km/h
- Development per rev
- 2,3 м
- Gear inches
- 29"
Development = front/rear × wheel circumference. For climbing: ratio <1 (e.g. 32×34). Road: 50×11 at 90 rpm ≈ 60 km/h. Avoid cross-chaining — big×big wears the chain.